I am a Christian and celebrate the birth of Christ each year. Part of that celebration is putting up a a CHRISTmas tree. I could care less if some atheists, Jews, Muslims or whoever else put up Christmas trees but I guess I don't understand why they would? I don't put up a menorah at Hanukkah because I am not Jewish. I also don't fast during Ramandan because I am not a Muslim. I respect all religions but I guess I don't understand why non-Christians care to celebrate the birth of Christ if it is something they don't believe in.